Wheel chair assembly

ABSTRACT

A wheel chair assembly includes two identical side assemblies each of which has a front part and a rear part and a top link and a low link are respectively inserted in the horizontal fittings on the front part and the rear part. A pivotable device is pivotally connected between the top links and the low links of the two side assemblies. A hanger bracket and a caster are respectively connected to each of the front part. The rear parts each have a plurality of holes so that the shaft of the rear wheel is inserted in one of the holes.

FIELD OF THE INVENTION

[0001] The present invention relates to a wheel chair assembly whichincludes modular parts that are easily to be assembled and allow theusers to adjust the size of the wheel chair so as to meet needs.

BACKGROUND OF THE INVENTION

[0002] A conventional wheel chair generally includes a plurality ofmetal tubes which are welded or soldered to be a specific shape ofassembly and the assemblies are connected with each other to form awheel chair. Generally, the conventional wheel chair is assembled by twoside assemblies which are the same and a pivotable device is used toconnect the two side assemblies. The shape of each of the sideassemblies is fixed and cannot be adjusted so that the conventionalwheel chairs can only be folded by pivoting the pivotable device to pushthe two side assemblies toward each other. In order to meet thedifferent needs of the users, the wheel chairs includes a first typethat is designed for the users who can drive the wheels and move bytheir own, and a second type which is designed for the users who cannotoperate the wheel chairs and have to be assisted by others. For thefirst type of the wheel chairs, the distance between the caster and therear wheel is smaller than that of the second type so that the users ofthe first type wheel chairs can operate the wheels to move the wheelchairs. On the contrary, for the second type of the wheel chairs, thedistance between the caster and the rear wheel has to be longer so as tobe move in a stable status. Besides, the metal tubes are welded orsoldered together and this takes a lot of time and is incurred by highcost.

SUMMARY OF THE INVENTION

[0003] In accordance with one aspect of the present invention, there isprovided a wheel chair assembly which comprises two identical sideassemblies and a pivotable device is pivotally connected therebetween.Each side assembly includes a front part, a rear part, and atop link anda low link are respectively connected between the two first horizontalfittings and the two second horizontal fittings on the front part andthe rear part. A hanger bracket with a footplate and a caster arerespectively connected to the front part.

[0004] The rear part has a plurality of holes defined therein and tworear wheels each have a shaft which is inserted in one of the holes ineach of the rear parts.

[0005] The primary object of the present invention is to provide a wheelchair that is assembled by modular side assemblies and the tubes of eachof the side assemblies are positioned by screws.

[0006] The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawingswhich show, for purposes of illustration only, a preferred embodiment inaccordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007]FIG. 1 is a perspective view to show the wheel chair of thepresent invention;

[0008]FIG. 2 is a side view to show the wheel chair of the presentinvention;

[0009]FIG. 3 is an exploded view to show one of the two side assembliesof the wheel chair of the present invention, and

[0010]FIG. 4 shows that the positions of the rear wheels can beadjusted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0011] Referring to FIGS. 1 to 3, the wheel chair of the presentinvention comprises two identical side assemblies and each have a frontpart 10, a rear part 50, a top link 20 and a low link 30. The front part10 has two first horizontal fittings 11, 12 extending from a rear sidethereof for the top link 20 and the low link 30 inserted thereinrespectively. The top link 20 and the low link 30 are secured byextending screws through the two first horizontal fittings 11, 12. Thetop link 20 has two retaining members 21 extending therefrom forretaining a rod of the pivotable device which will be described later. Ahanger bracket 80 has an insertion secured in a top hole 13 in the frontpart 10 and a footplate is connected to a lower end of the hangerbracket 80. A caster 90 has a connection plate 14 which is connected tothe front part 10.

[0012] The rear part 50 has two second horizontal fittings 51, 52 forthe other ends of the top link 20 and the low link 30 respectivelyinserted therein. The top link 20 and the low link 30 are also securedby extending screws through the two second horizontal fittings 51, 52. Ahandle 60 is connected to a top hole of the rear part 50 and a pluralityof holes 54 are defined in the rear part 50. Two rear wheels 70 eachhave a shaft which is inserted in one of the holes 54 in each of therear parts 50.

[0013] The pivotable device pivotably connected between the two sideassemblies includes two H-shaped frames which are pivotably connectedwith each other at two respective intermediate points 41 thereof. Eachof the two H-shaped frames has a tube at a first end thereof and the lowlink 30 passes through the tube. A rod 40 is connected to a second endof each of the two H-shaped frames and is engaged with the retainingmember 21.

[0014] Referring to FIG. 4, the position of the rear wheels 70 can beadjusted by removing the shaft of the rear wheel 70 from one hole 54 toanother so that the distance between the caster 90 and the rear wheel 70can be adjusted. The way that the top links 20 and the low links 30connected to the front part 10 and the rear part 50 are made byinserting the top links 20 and the low links 30 in the horizontalfittings 11, 12, 51 and 52 so that it is easily to be assembled andneeds no soldering machines.

[0015] While we have shown and described the embodiment in accordancewith the present invention, it should be clear to those skilled in theart that further embodiments may be made without departing from thescope of the present invention.

What is claimed is:
 1. A wheel chair assembly comprising: two identicalside assemblies and each having a front part, a rear part, a top linkand a low link, the front part having two first horizontal fittings forthe top link and the low link inserted therein respectively, a hangerbracket connected to a top of the front part and a footplate connectedto a lower end of the hanger bracket, a caster connected to the frontpart; the rear part having two second horizontal fittings for two theother ends of the top link and the low link respectively insertedtherein, a handle connected to a top of the rear part, a plurality ofholes defined in the rear part; a pivotable device pivotably connectedbetween the two side assemblies, and two rear wheels each having a shaftwhich is inserted in one of the holes in each of the rear parts.
 2. Thewheel chair assembly as claimed in claim 1, wherein the pivotable deviceincludes two H-shaped frames which are pivotably connected with eachother at two respective intermediate points thereof.
 3. The wheel chairassembly as claimed in claim 2, wherein each of the two H-shaped frameshas a tube at a first end thereof and the low link passes through thetube, a rod connected to a second end of each of the two H-shaped framesand each of the two top links has two retaining members which areengaged with the two respective rods of the two H-shaped frames.
 4. Thewheel chair assembly as claimed in claim 1 further comprising screwsextending through each of the first horizontal fittings and the secondhorizontal fittings to fix the top links and the low links in the firsthorizontal fittings and the second horizontal fittings.